Insulated flask



FIG. 1 is a side view of an insulated flask showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom view thereof; and,

FIG. 6 is a side view of the insulated flask of FIG. 1 in an open position. 

The ornamental design for an insulated flask, as shown and described. 